Mark Sisson is the founder of Mark's Daily Apple and Primal Kitchen (the mega-popular brand of salad dressing, energy bar, protein powder and more), the author of the brand-new The Keto Reset Diet: Reboot Your Metabolism In 21 Days to Burn Fat Forever, and the man responsible for empowering millions of people to take back control of their health. While he's now renowned as the founder of the modern-day paleo or primal diets, he wasn't always this way. Once an Ironman athlete and competitive runner, Mark used to eat a primarily carbohydrate-rich diet to fuel his athletic endurance.

Seventeen years ago, he gave up grains, and it was then that pieces of the puzzle finally began to shift into place and the diseases that had been weighing him down—from IBS to chronic upper respiratory tract infections—began to clear up. He started Mark's Daily Apple, the mega-popular wellness blog, and now—nine books, hundreds of talks, and a product line later—well, the rest is history.

In today's episode, Mark shares how his rigid diet has evolved over time (you'll want to tune in just to hear his take on legumes and lectins), how he optimizes his mitochondria, his thoughts on Bulletproof coffee, and much, much more. He also shares how long you have to do keto for it to have a lasting effect (it's not as long you'd think!) and why he thinks "virtually every disease of civilization can be mitigated by lifestyle choices." Tune in to find out exactly how.